Comparison

AO Surgery Reference vs BMI BSA Breast Reduction Calc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AO Surgery Reference

Access a comprehensive online repository of surgical knowledge for fracture management. It provides detailed guidance on diagnosis, treatment, and aftercare for numerous fracture types, supported by extensive illustrations and expert review.

Highlights
  • 353 fracture types covered
  • 172 surgical approaches
  • 1222 surgical procedures
  • Over 30,000 illustrations
  • Feline, canine, and equine fracture care
  • Powerful search function
Features
Read full description

QUICK ONLINE REFERENCE IN CLINICAL LIFE Gain easy access to the award-winning AO Surgery Reference. AO Surgery Reference is an online repository for surgical knowledge. It describes the complete surgical management process from diagnosis to aftercare for all fractures of a given anatomical region, and also assembles relevant material that the AO has published before. It gives access to:   • aid in surgical decision making for 353 fracture types • 172 approaches • 1222 surgical procedures • all richly illustrated with more than 30'000 Illustrations and much more. To ensure the quality of the content, it is authored, edited, and peer reviewed by experienced AO Faculty from all over the world, some of which are also well-known textbook authors/editors. This is a relaunch of the AO Surgery Reference app utilizing the same responsive user interface that was released February 2020. The highlights are: • Consistent navigational logic and user experience on all screen sizes • Inclusion of feline, canine, and equine fracture care • Combination of Preparation – Approach – Reduction and Fixation – Aftercare into one step called treatment. • Introduction of a powerful search function, allowing simplifications of the user interface as it replaces previous shortcuts.

About

BMI BSA Breast Reduction Calc

Calculate Body Surface Area, Body Mass Index, Ideal Body Weight, and Schnur Weight for breast reduction surgery. This tool assists medical professionals and patients in making informed decisions about surgical procedures and medical necessity.

Highlights
  • Body Surface Area calculation
  • Body Mass Index calculation
  • Ideal Body Weight calculation
  • Schnur Weight calculation
  • Physician-developed tool
  • Useful for breast reduction surgery
Features
Read full description

This app was written and developed by a surgeon to provide a quick and easy tool for calculating Body Surface Area, Body Mass Index, Ideal Body Weight and Breast Schnur Weight. Schnur Weight is used as a reference by plastic surgeons performing breast reduction surgery and is often utilized by insurance companies in the U.S. to determine if the amount of breast tissue removed from each breast is "medically necessary." Consult the medical insurance company to see if they use Schnur tables, as not all of them do. In many cases, by knowing this value, patients and surgeons can discuss breast reduction surgery with more information and less guess work. This app is also useful for anyone who needs a fast and convenient BMI/BSA calculator. Bariatric specialists, primary care physicians, plastic surgeons are just a few examples. We hope you find this app useful! Feel free to send feedback (through the app) if you have any ideas for improvement.

Screenshots

AO Surgery Reference4 screens
BMI BSA Breast Reduction Calc3 screens

Verdict

The call

The clearest difference is rating: BMI BSA Breast Reduction Calc at 5.0 against AO Surgery Reference's 4.4. BMI BSA Breast Reduction Calc also leads on update cadence (every 6 weeks vs every 6 months) and review sentiment (100% vs 86%). AO Surgery Reference's advantage is ratings volume (14 vs 4). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

BMI BSA Breast Reduction Calc holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 14 and 4 respectively. Written reviews point the same way: 86% of AO Surgery Reference's written reviews are positive against 100% of BMI BSA Breast Reduction Calc's.

UpkeepUpdate frequency

AO Surgery Reference ships an update every 6 months, BMI BSA Breast Reduction Calc every 6 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
AO Surgery Reference versus BMI BSA Breast Reduction Calc: the parameters behind the verdict, then further details
ParameterAO Surgery ReferenceBMI BSA Breast Reduction Calc
PriceFreeFree
Rating4.4 (14 ratings)5.0 (4 ratings) — better
Positive reviews85.8% of reviews100.0% of reviews — better
Number of ratings14 — better4
Update frequencyEvery 6 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size1 MB19 MB
Age rating17+12+
DeveloperAO FoundationCode Surgeon LLC

Customer experience

AO Surgery Reference

All ratings14 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews113 reviews
Positive85.8%
Neutral3.5%
Negative10.6%

BMI BSA Breast Reduction Calc

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

AO Surgery Reference

No in-app purchases

None

BMI BSA Breast Reduction Calc

No in-app purchases

Questions

Is AO Surgery Reference free?
AO Surgery Reference is free to download, with no in-app purchases.
Is BMI BSA Breast Reduction Calc free?
BMI BSA Breast Reduction Calc is free to download, with no in-app purchases.
Which has better reviews, AO Surgery Reference or BMI BSA Breast Reduction Calc?
BMI BSA Breast Reduction Calc is rated higher. AO Surgery Reference averages 4.4 out of 5 from 14 ratings, while BMI BSA Breast Reduction Calc averages 5.0 from 4 ratings.
Do AO Surgery Reference or BMI BSA Breast Reduction Calc have ads?
Neither AO Surgery Reference nor BMI BSA Breast Reduction Calc shows ads.
Which is updated more often, AO Surgery Reference or BMI BSA Breast Reduction Calc?
AO Surgery Reference ships an update every 6 months, and BMI BSA Breast Reduction Calc every 6 weeks. Most recently, AO Surgery Reference was updated on November 1, 2026 and BMI BSA Breast Reduction Calc on November 3, 2026.

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